Freelancer Is Recruiting Thousands to Help Train AI Robots
Huge opportunity for ongoing work from a massive new Freelancer project
Arduino is an open source platform widely used by professional engineers and hobbyists to create interactive electronics projects. An Arduino Engineer is a skilled and experienced individual who can custom-build integrated hardware designs tailored to individual client projects. They are knowledgeable in designing, constructing, and testing cutting-edge hardware projects.
An Arduino engineer can create any kind of electronic circuit design. They are able to develop prototypes for a test version, incorporate vital components such as integrated circuits and relays, code the project with both C and C++ programming languages, as well as generate HTML and Java-based user interfaces. Furthermore, they can assist clients with the setup or installation of hardware or embedded systems.
Here's some projects that our expert Arduino Engineer made real:
The possibilities of what an Arduino Engineer can accomplish are vast. Our select group of engineers have propelled our clients projects into fruition through numerous successful projects. From designing a counter designed for social media followers, to constructing a PCB for advanced Arduino Nanos control systems - our engineers have done it all. And now Freelancer.com invites you to join our international community of experts, who can help bring your own project ideas to life! Post your project now and hire a freelance Arduino engineer on Freelancer today!
From 33,569 reviews, clients rate our Arduino Engineers 4.9 out of 5 stars.Arduino is an open source platform widely used by professional engineers and hobbyists to create interactive electronics projects. An Arduino Engineer is a skilled and experienced individual who can custom-build integrated hardware designs tailored to individual client projects. They are knowledgeable in designing, constructing, and testing cutting-edge hardware projects.
An Arduino engineer can create any kind of electronic circuit design. They are able to develop prototypes for a test version, incorporate vital components such as integrated circuits and relays, code the project with both C and C++ programming languages, as well as generate HTML and Java-based user interfaces. Furthermore, they can assist clients with the setup or installation of hardware or embedded systems.
Here's some projects that our expert Arduino Engineer made real:
The possibilities of what an Arduino Engineer can accomplish are vast. Our select group of engineers have propelled our clients projects into fruition through numerous successful projects. From designing a counter designed for social media followers, to constructing a PCB for advanced Arduino Nanos control systems - our engineers have done it all. And now Freelancer.com invites you to join our international community of experts, who can help bring your own project ideas to life! Post your project now and hire a freelance Arduino engineer on Freelancer today!
From 33,569 reviews, clients rate our Arduino Engineers 4.9 out of 5 stars.I’m building an AIS-140 compliant tracking unit and need one partner who can take the idea from schematic to fully tested firmware in a single run. That means you will design the multilayer PCB, select components that satisfy ARAI / AIS-140 certification, and deliver production-ready firmware that handles GPS/GNSS acquisition, GSM/LTE data transfer, SMS fall-back, panic button logic, CAN interface, and standard-mandated encryption and packet formats. Scope • Complete schematic capture and PCB layout (Altium, KiCad, or similar) including Gerbers, BOM, 3-D step files, and assembly drawings. • Firmware in C/C++ (preferred on STM32 or an equivalent automotive-grade MCU) covering GNSS parsing, GPRS/LTE socket handling, FOTA, accelerometer-based tamper detection, and diagno...
The prototype should include: A representative UAV mock-up or training model. A visual indication of different sensing modalities, including: Electro-Optical (EO) Infrared (IR/Thermal) Radar (conceptual only) A microcontroller-based interface (e.g., Arduino or ESP32) to control LEDs, displays, or other non-operational indicators that represent the active sensing modality. A simple user interface to switch between demonstration modes. Clear labeling and documentation explaining each sensing concept. Deliverables System architecture and wiring diagram. PCB or breadboard prototype. Embedded software/firmware. Bill of Materials (BOM). Assembly guide. User manual for classroom demonstrations.
I'm seeking an experienced PCB designer to create a multi-layer PCB for a consumer electronics radio device. The PCB will need to interface with microcontrollers and sensors. Key Requirements: - Expertise in multi-layer PCB design - Experience with consumer electronics, especially radio devices - Ability to integrate microcontrollers and sensors Ideal Skills and Experience: - Proficiency in PCB design software (e.g., Altium, Eagle) - Strong background in electronics and circuit design - Previous experience with radio frequency (RF) applications is a plus - Attention to detail and commitment to quality - Experience in designing of boards with components which can communicate via Wifi - Programming in Arduino - Familiar with ESP32 dev board programming Please share your portfolio and...
I need help flashing Android 13 onto a Radxa Cubic A7z tablet. My goal is a clean installation of the new OS rather than an upgrade over the existing system. I already have the complete Android 13 image, drivers, and any package files that may be required; what I’m missing is an expert who can guide the process end-to-end, confirm compatibility, and make sure the device boots correctly afterward. Ideally you are comfortable with tools such as SP Flash Tool, ADB/Fastboot, or any utility you prefer for this chipset, and you’ve dealt with bootloader unlocking, driver conflicts, and recovery flashing before. If a particular flash tool version is critical, please let me know so I can have it ready on my Windows PC. Deliverables • Verified step-by-step guidance (or remote ex...
**Project Title:** Firmware Development for Li-ion Home UPS (Renesas MCU) We are looking for an experienced Embedded Firmware Engineer/Freelancer to develop firmware for a Li-ion Home UPS product using a Renesas microcontroller. **Project Details:** * Product: Li-ion Home UPS * Rating: 1250VA / 12.8V (4S LiFePO4 Battery) * MCU: Renesas * Topology: Low Frequency Transformer Based Home UPS **Scope of Work (3 Stages):** **Stage 1:** * ADC implementation (Battery Voltage, Current, Temperature) * LCD Display Development * Relay, Fan, and Buzzer Control * Fault Code Display **Stage 2:** * SPWM Generation * Inverter Control * Battery Charging Algorithm * Mains Changeover Logic * Protection Features (Overload, Short Circuit, Low Battery) **Stage 3:** * BMS Communication * Backup Time Est...
I have a prototype that has to drive two independent BLDC motor drivers from a single hobby-grade RC transmitter. Both motors must respond to the same handset, with full speed and direction control on each channel. The throttle stick should give smooth, variable speed rather than stepping through fixed levels, and the entire solution needs to stay as compact as possible so it can fit inside a small housing I already have. Here is what I need from you: • Hardware: a complete schematic and compact PCB that takes the receiver’s PPM and feeds two BLDC driver stages. Component selection should balance size, thermal performance, and ready availability. • Firmware: clean, well-documented code that reads the RC signals, maps them to forward/reverse and proportional duty cycle ...
# 3D CAD Designer Needed for LEGO-Compatible Models with Electronics Integration We are looking for an experienced **3D CAD designer** to design innovative **LEGO-compatible models** that can integrate electronic or electrical components. ## Project Requirements * Create high-quality 3D models compatible with LEGO dimensions and building standards. * Design parts that can accommodate electronic or electrical components such as: * Arduino * ESP32 * Raspberry Pi Pico * DC motors * Servo motors * Sensors * LEDs * Batteries and battery holders * Switches and connectors * Ensure all parts are optimized for **3D printing** (FDM printing preferred). * Produce clean, parametric CAD models (Fusion 360, SolidWorks, or Onshape preferred). * Design parts that are strong, easy to ...
I’m gearing up for a high-profile cosplay appearance and want to wow the crowd with a life-size robotic cat—think full-grown panther rather than a small prop. Its core role is to put on a show: vivid facial expressions, fluid body movements, and synced sound effects that together create the illusion of a living, highly intelligent companion. What I need from you • Complete design and build of the cat’s frame, drive system and outer shell, finished to stage-quality standards. • An animation system that lets me trigger or pre-program multiple “moods”—happy, curious, annoyed, sleepy—using expressive eyes, movable ears, tail swishes, and subtle body shifts. • A sound module that plays purrs, meows and short vocal reactions in harm...
A dedicated PCB will drive a self-service car-wash “vendo” unit built around an Arduino Nano. The board must accept the pulse output from a standard electronic coin slot, translate each valid coin into the required runtime, and use that signal to energise five independent relays that handle pumps, valves, or lights. All relays share a common 12 V source, yet the Nano and logic lines stay safely at 5 V, so on-board regulation (12 V → 5 V buck or linear, as you judge appropriate) is part of the layout. The relays themselves need fly-back protection, status LEDs, screw-terminal or JST headers for easy field wiring, and clear silkscreen labelling. A USB-B or tag-connect footprint for in-circuit programming is also required. Deliverables • Complete schematic (KiCad...
I need single-sided, double-sided, and full multi-layer PCB layouts created for mixed-signal work. The boards combine analog and digital circuitry and will be used across embedded control, RF, and other high-speed applications, so careful impedance control, differential-pair routing, and solid mixed-signal grounding are essential. Altium Designer is my main environment, yet I can seamlessly integrate files produced in Proteus, KiCAD, Eagle CAD, EasyEDA, or even Multisim, so feel free to use whichever of those platforms fits your workflow best. What I expect from you: • Complete schematic capture and net-validation • Fully routed PCB layout that passes DRC and is ready for fabrication • Gerber (or ODB++) files, drill data, and a clean BOM suitable for procurement ...
I am looking for an experienced PLC programmer to do on a small CODESYS 3.5 automation project. The task involves creating a simple sequential control process using sensors, motor control, a loading gate, and a 10-second timer.
I need a purpose-built Electronic Speed Controller for my electric glider that runs on 3-6 cell Li-Po packs (8.4 V – 11.1 V). The unit must deliver: • Responsive throttle control for a brushless motor • Integrated battery management with safe low-voltage cut-off and, if practical, basic current limiting • A reliable brake function to stop a folding prop cleanly in flight Compact size, light weight and maximum efficiency are important, as the airframe has limited space and every gram counts. Here is what I would like from you: 1. Schematic, PCB layout and BOM (KiCad, Altium or similar) 2. Firmware source code with clear parameter tables (C / STM32, ATMEL AVR or comparable MCU) 3. Simple desktop configuration tool or clear CLI instructions so I can adjust ti...
This project is an automated health tracking application developed using Python to monitor body temperature and detect anomalies in real-time. By bridging the gap between software and hardware prototyping, the system continuously reads live data streams from sensors via serial communication. The core Python backend processes this data, checks it against standard medical temperature thresholds, and instantly visualizes the live logs on a clean, custom graphical user interface (GUI) dashboard, making health tracking highly accessible and efficient. Key Highlights of the Project: Real-Time Processing: Uses Python's serial communication (pyserial) to fetch continuous live temperature data from hardware sensors. Instant Fever Alerts: Implements precise threshold logic to immediately fla...
I already have a partially-working prototype for an industrial counter + timer built around an Arduino. It needs to count production units while tracking elapsed time in parallel, show both values on an LCD screen, and push the data over Wi-Fi to my factory LAN. Where I’m at • Core hardware is assembled and a rough sketch is running, but the logic occasionally drifts and the Wi-Fi payloads are not stable. • The prototype can be shipped to you immediately, fully labelled and with a wiring diagram of the current build. What I need from you 1. Clean, well-commented Arduino code that reliably performs the simultaneous counting and timing functions. 2. Solid LCD interface: clear, easy-to-read formatting of count, timer, and simple status icons. 3. Robust Wi-Fi routin...
I’m building a handheld device that lets me roll a ball across any flat surface and have it actively steer itself so the pen mounted inside draws in the exact direction I choose. An optical-flow sensor will read surface motion, my code will translate that into heading commands, and two small motors inside the ball will supply the corrective spin. The overall sketch is already under way, but I need a specialist who knows Arduino-style hardware and, more importantly, how to marry miniature motors with an ESP32-C module for precise directional control of the ball. Your main focus will be advising on the right motor format, driver circuitry, power budgeting, and the physical/electrical integration so the firmware can call simple functions like setHeading() or setVelocity(). I’m ...
I want to turn a concept for a pneumatic actuator into a working prototype that can grip or clamp objects with repeatable, controllable force. The job spans mechanical design, pneumatic circuit sizing, and the embedded-software layer that will let me test different grip profiles through a simple interface. Scope • Translate my sketches and performance targets into detailed CAD ready for rapid manufacture (CNC, SLA or FDM are all fine). • Select off-the-shelf valves, fittings and sensors, then size the cylinder and air supply so the gripper reaches its force and stroke goals. • Develop quick-change firmware or a ROS/Arduino node that lets me adjust pressure, speed and dwell time from a laptop while logging position/force data. • Assemble and bench-test the unit,...
I aim to develop a solution that will facilitate data communication between an Arduino UNO and a SIM7600E using AT+COMMAND. The primary data in focus will be temperature sensor readings. Key Responsibilities: - Setting up a reliable connection between Arduino UNO and SIM7600E - Implement AT+COMMAND for effective communication - Design a protocol for transmitting temperature sensor data Ideal Skills: - Solid knowledge of Arduino - Proficiency in handling SIM7600E - Experience in implementing AT+COMMAND - Understanding of sensor data transmissions. Please ensure you can efficiently deliver on these requirements, and provide the mentioned sensor data communication before placing your bid.
Huge opportunity for ongoing work from a massive new Freelancer project
Most enterprises already had an AI agent security incident. Here's why hiring a human for oversight still beats trusting the agent alone.
A new Gallup poll found small business the only U.S. institution with real bipartisan trust. Here's why that matters if you're building one.